I have a skillet, deep skillet, and dutch oven and lid set in #8, almost had that in #7, and sold a #8 set (cleaned and seasoned) to a friend. I believe that style of size lettering and rougher finish came about in 1939 when Birmingham Stove and Range bought their automatic casting machinery.
Onions, potatoes, sausage, cheese, cream of mushroom soup, seasonings, 1 hour at 350, lid off, another 1/2 hour, good.